Ok, so. The formula is F=qv x B, meaning that the force vector is an orthogonal vector equal to the cross product of vectors qv and B. There are, however, 2 orthogonal vectors, in each direction. The thing I am having trouble understanding is why is one direction chosen over the other. I understand that this is demonstrated in the right hand rule, but the magnetic forces do not orient themselves in such a way just because that's the shape of my hand.